I'm not the person you asked but I feel like answering with my (unwanted) perspective. The statue of David, in its current context in a museum is not a particuarly sexual or sexist object. On the other hand if my employer (or whoever) started introducing equivalent statues of naked people (of any sex) into my workplace I would probably view that as innapropriate.
This is essentially how I view the image of Jennifer - in the context of a loving relationship between two people on the beach its a nice thing, but I would view it as a bit weird if someone at my workplace started sharing an equivalent picture of their partner.